Cluster article
SFM Stone Mill Configurations: 100, 1+2 and 3+4 Compared
Technical comparison of the three Haiyun stone mill configurations — capacity, power, footprint, extraction, roller-to-stone ratio and which buyer each one fits.
Key takeaways
- SFM-100: 50 kg/h, 6 kW, pure stone, entry point.
- SFM-1+2: 200 kg/h, 21 kW, one roller mill plus two stones — the commercial sweet spot.
- SFM-3+4: 600 kg/h, 80 kW, three rollers plus four stones — regional supply scale.
SFM-100 — pure stone, entry level
| Parameter | Value |
|---|---|
| Capacity | 50 kg/h |
| Power | 6 kW |
| Footprint | 3 × 2 × 3.2 m + height |
| Stone mills | 1 |
| Roller mills | 0 |
| Extraction | 85–92% (whole wheat) |
| Shift output | 0.4 t over 8 hours |
Automatic feeding, sifting and grinding in one unit. The stones turn at 28–30 rpm and the flour leaves cold.
Best for: a bakery adding a stone-milled SKU, a farm selling direct, a pilot line proving a market.
Limitation: 0.4 t per shift is small. It works for a bakery that uses the flour itself; it does not work for supplying distributors.
SFM-1+2 — hybrid, commercial
| Parameter | Value |
|---|---|
| Capacity | 200 kg/h |
| Power | 21 kW |
| Footprint | 6 × 5 × 4 m + height |
| Stone mills | 2 |
| Roller mills | 1 |
| Extraction | 78–85% |
| Shift output | 1.6 t over 8 hours |
One roller mill does the first break — splitting wheat and releasing core particles, which are screened out and sent to two stone mills. The stones grind clean endosperm rather than whole kernels.
The effect is significant: you keep the cold-grind character while raising yield and throughput. Rolling before stoning removes bran early, so the stones spend their limited capacity grinding endosperm instead of rubbing bran.
Best for: commercial stone millers supplying health-food distribution, premium bakery contracts, export orders.
Why it is the sweet spot: 1.6 t per shift is enough to supply a regional distributor, and the economics work at a 1.5× price premium.
SFM-3+4 — hybrid, industrial
| Parameter | Value |
|---|---|
| Capacity | 600 kg/h |
| Power | 80 kW |
| Footprint | 24 × 6 × 4.5 m + height |
| Stone mills | 4 |
| Roller mills | 3 |
| Extraction | 76–82% |
| Shift output | 4.8 t over 8 hours |
Three roller mills extract the core in a single pass with bran/core separation and double-bin flat sifting. Four stone mills then grind.
Best for: regional health-food distribution, premium export contracts, a mill that already has distribution and needs volume.
Warning: 4.8 t per shift is 100 t per month. Do not install this until you have a distribution plan that can absorb it. Capacity without distribution is a warehouse full of flour going rancid.
Side by side
| SFM-100 | SFM-1+2 | SFM-3+4 | |
|---|---|---|---|
| Capacity | 50 kg/h | 200 kg/h | 600 kg/h |
| Power | 6 kW | 21 kW | 80 kW |
| kWh/t | ~120 | ~105 | ~133 |
| Shift output | 0.4 t | 1.6 t | 4.8 t |
| Monthly output | 8–10 t | 35–40 t | 100–110 t |
| Extraction | 85–92% | 78–85% | 76–82% |
| Labour | 1 | 2 | 3–4 |
Note that SFM-3+4 has the highest specific energy — it adds three roller mills on top of four stones, so the efficiency gain at that scale comes from labour and throughput, not from energy.
Choosing
Ask three questions:
- What will you sell per month? If under 10 t, SFM-100. Under 40 t, SFM-1+2. Over 80 t, SFM-3+4.
- Do you need white flour or whole wheat? Pure stone makes whole wheat well and white flour badly. Hybrid can do both.
- Who operates it? Hybrid configurations need someone who understands roll settings as well as stone dressing.